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相关概念视频

X-ray Imaging01:24

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German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...
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Computed Tomography01:10

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Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
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Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...
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Imaging Studies II: Ultrasonography01:24

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IntroductionUltrasonography, or renal ultrasound, is a noninvasive medical imaging technique that uses high-frequency sound waves to visualize the kidneys, ureters, bladder, and surrounding tissues.Indications for Urinary System UltrasonographyUrinary system ultrasonography is indicated in various clinical scenarios, such as:Kidney Stones (Urolithiasis): To detect and monitor the size and presence of kidney or urinary tract stones.Hydronephrosis: To assess the dilation of the renal pelvis and...
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Imaging Studies III: Computed Tomography01:27

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DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
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Imaging Studies VII: Vascular Imaging01:19

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DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...
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实时全体积行列成像实时成像

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    此摘要是机器生成的。

    本研究介绍了GPU加速体积束成型,用于使用行列定位数组 (RCAs) 的实时3D超声波成像. 优化的算法实现了高率,使消费者硬件具有先进的成像功能.

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    科学领域:

    • 医疗成像医学成像
    • 超声波技术 超声波技术 超声波技术
    • 计算成像技术的成像

    背景情况:

    • 卷度超声波成像传统上需要大量的计算资源.
    • 实时3D成像对于许多临床应用至关重要,但通常受到处理速度的限制.
    • 排列列列地址阵列 (RCAs) 提供了先进超声波的潜力,但需要高效的光束成形.

    研究的目的:

    • 在图形处理单元 (GPU) 上实现和优化RCAs的体积束成型.
    • 用消费级GPU展示实时3D超声波成像能力.
    • 评估拟议的GPU光束成形方法的性能和效率.

    主要方法:

    • 使用可分离的光束成形算法,将计算负载减少每体积65倍.
    • 优化包括在相邻的像素和之间重复使用计算和样本.
    • 波束转换器是用CUDA C++实现的,并在NVIDIA GeForce RTX 4090,2080 Ti和3090 GPU上进行了测试.

    主要成果:

    • 该GPU光束制造器实现了每秒1440个体积的处理速度,明显超过实时要求 (≥12kHz发射率).
    • 该系统实现了理论GPU浮点吞吐量的22%.
    • 实时3D成像使用标准超声波扫描仪和单一显卡进行了演示.

    结论:

    • 通过GPU加速的体积光束成型,可以实时使用RCAs进行3D超声波成像.
    • 优化的方法显著降低了计算复杂性,使先进的成像可访问.
    • 这项技术为具有成本效益的,高性能的3D超声波系统铺平了道路,与2D设置相匹配.